|
|
Article: Electrorheological characterization of semiconducting polyaniline suspension.(5th International Conference on Polymer Characterization)
- Article from:
- Polymer Engineering and Science
- Article date:
- March 1, 1999
- Author:
CopyrightCOPYRIGHT 1999 Society of Plastics Engineers, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
INTRODUCTION
Electrorheolgical (ER) fluids are suspensions of polarizable particles in a nonconducting oil. They exhibit a dramatic change in the rheological and electrical properties such as viscosity, yield stress, viscoelasticity, and dielectric constant by imposing an electric field. This change is due to the migration of particles and formation of a chainlike or columnar structure oriented along the electric field direction over the gap between the electrodes (1-3). The structure formation is known to be induced by the mismatch of the dielectric constant between the suspended particle and nonconducting oil (4).
Although a number of theoretical ...